Fluid-pressure-operated valve.



H. G. GEISSINGBR. FLUID PRESSURE OPERATED VALVE. APPLICATION FILEDSEPT.8, 1910.

1,055,1 61 Patented Mar. 4, 1913.

2 SHEETS-SHEET l.

Smwtoz 1%6I Gen-551777 7 H. G. GEISSINGBR. FLUID PRESSURE OPERATEDVALVE. APPLICATION FILED SEPT.8,1910.

1,055,161. Patented Mar.4, 1913.

2 SHEBTS-SHBET 2.

UNITED STATES OFFICE.

HARRY G. GEISSINGERL, OF NEW YOBLK, N. Y., ASSIGNOR TO GEISSINGERREGULATOR COMPANY, OI YORK, N. Y., A CORPORATION OF NEW YORK.

FLUID-PRESSURE-OPERATED VALVE.

Specification of Letters Patent.

Patented Mar. 4, 1913.

Operated Valves, of which the following is a specification.

My invention relates to valves and particularly to electricallycontrolled valves for controlling fluids under pressure,

One of the objects of my invention is to dispense with the use ofstulting-boxes for the movable parts of the valve and to provide acompact device in which the operating parts are readily accessible.

Another object is to completely isolate the electric energizing coilsfrom the other portions of the valve mechanism without intertering withthe freedom of movement of the movable parts.

A further object is to provide a device in which the valve, when in theopen position, will remain in equilibrium between certain predeterminedlimits of pressure variation and thus avoid any vibration or chatteringupon the valve seat which produces a rapid wear and destruction of theparts.

In order that my invention may be clearly understood, reference is madeto the follow ing description in connection with the accompanyingdrawings, in which Figure 1 is a vertical cross-section of a valveembodying my invention; and Fig. 2 is a vertical cross-section of amodified form thereof.

Referring to Fig. 1, the valve casing 1 is provided with the'usualdiaphragm or partition 2, having an'annular seat 3 surrounding the valveopening and upon which the main valve 5 rests in the lower or closedposition. The depending guiding lugs 6 are formed on a ring providedwith an annular shoulder which secures the washer 7 within a recess inthebase or disk 5 of the valve 5.

A weighted pressure-reducing valve 8 is slidingly mounted within acentral cavity 9 of the valve and in its lower position closes a channel10 connecting the valve-cavity with the inlet side of the casing. Thevalve cavity is closed. at the top by means of a hollow thimble or cap12 having a contracted orifice 13. l

The controlling mechanism of the valve is supported within a shell 15,which is preferably threaded upon a flange 16, surrounding an orifice ofthe valve casing concentric with the valve .stem. A disk 18, threadedupon the upper end of the shell 15, is provided with a depending plungeror piston 19. Surroundingthe piston and mounted to slide thereon is acylinder 20, which is supported upon and presses downwardly on the valve5, a plurality of washers or packing members 21 being interposed for thepurpose of securing a tight joint.

It will be observed that the chamber 22 of the cylinder is incommunication with the cavity 9 in the stem of the main valve.Communication is established between the inner cylinder chamber 22 andthe shell chamber 24 by means of the passages 25 and 26, .in the plungeror piston 19, the port 27 connecting these two passages being controlledby the pilot valve 28, slidingly -mounted in the cavity'29.

For the purpose of actuating and controlling the pilot valve, anelectroma net is mounted upon the disk 18, and preierably comprises amagnetic shell 30, inclosing an energizing coil 31 and central core 32provided with a disk 33 constituting a central pole,'the annular disk orring 34 foiming the other pole of the magnet. The plate or disk 36,forming the armature is rigidly secured to the stem of the pilot valve28. A nonmagnetic plate 37, completely isolates the magnet coil 31 fromthe valve passages, while the gasket 32, forms a tight joint between theplate and the disk 18. In order that there may be no magnetic shunt orpath for the magnetic flux between the magnet poles outside of thearmature, I construct' the disk 18 of a non-magnetic metal. Thisconstruction insures a very strong magnetic pull upon the armaturewhenever the coil 31 is energized.

The operation of the valve will be understood from the foregoingdescription.

The valve casing being connected to a pipe conveying steam or otherfluid under pressure, the steam in the inlet side of the casing willforce itself through the channel sure thereon.

10, past the weighted check valve 8, into the cavity 9 and through theorifice l3 into-the cylinder chamber 22 and the passage 25, beingprevented from entering passage 26 by the pilot valve 28 controlling theport 27 and will hold the main valve in the position shown. The area ofthe cylinder 20 is made larger than thatof the seat of'the valve in thediaphragm 2. If, for instance, the area of the cylinder is three timesthe area of the valve seat, then the downward force upon the valve istreble the upward pres- This downward force closes the valve against theflow of steam and maintains a tight joint between the valve stem and thecylinder which are separated by the washer 21.

The electromagnet which controls the pilot valve 28, may have itsenergizing coil connected in an electric circuit controlled by athermostat which automatically responds to changes of temperaturebrought about by the supply of steam, regulated by the valve in thecasing 1, the parts constituting the regulating elements of -a system ofautomatic temperature control: Upon energizing the coil 31, the armature36 is attracted, lifting the pilot valve 28 and opening the port 27. Thepressure of the pent steam in the chamber 22 and passage 25 is nowrelieved by passing through the port 27, passage 26, shell chamber 24and into the outlet side of the valve casing. If the areas of the partsare as above assumed, the upward and downward forces upon the main valvewill be equal as soon as the pressure in the chamber 22 falls toone-third of that in the inlet, assuming the pressure in the outlet ordischarge side of the casing 1 to be zero. When, therefore, the pressurein chamber 22 falls still lower the pressure in the inlet will lift themain valve 5 from its seat. A cushion 38 relieves any shock due to asudden upward movement of the cylinder against the piston 19.

When the pilot valve 28 is lifted or in the open position, it isapparent that the chamber 22 is in communication with the inlet side ofthe casing through the contracted orifice 13 in the main valve stem andwith the outlet side of the casing through the pilot valve seat or port27. The latter, as illustrated, should be made larger than the orifice13 for reasons hereina fterpointed out.

While the main valve is lifted, the valve disk 5 assumes a position thatproduces a fixed proportional difference of pressure between the inletand the outlet. There is also a continuous flow of steam through theinterior channels as indicated by the arrows. The pressure in thechamber 22 will be less than that of the inlet, but greater than that ofthe outlet, the relative pressure being determined by the proportionatediameters of the orifice 13 and the port 27. It will be seen, therefore,that the resultant pressure in the chamber 22 automatically adjusts thedrop in pressure between the two sides of the main valve disk 5.

The important function of the auxiliary weighted pressure-reducing valve8will now be pointed out.

Unless the weight of the main valve and the parts carried thereby is ineifect'eliminated or counter-balanced by an upward sustaining force, thevalve will vibrate or chatter as it is approaching its seat in themanner common to valves of this type, thus causing a rapid wear of theparts. It is apparent that the weight of the pressure-reducing valve 8,closing the passage 10, must hold back a certain amount of the steampressure, so that, in fact, the pressure in the cavity 9 is subject to afixed reduction in the pressure from the inlet due tothe weight of thispressure-reducing valve. This reduction in the downward pressure uponthe head of the cylinder 20, or its equivalent excess of upward pressureupon the disk 5, I make equal to the Weight of the moving parts 5, and20. The weight ofthe valve parts being thus eliminated from thepressures effecting the operation thereof,-

it thereby results that the main valve will, when in the raised or openposition, remain in a osition of equilibrium governed by the respectivepressures in the inlet, the outlet, and intermediate chamber 22, and thegoverningpressure in the intermediate chamber being determined by therelative areas of the orifice 13 and the pilot valve port 27. Itresults, therefore, that an increase of pres sure above the main valvewhen in raised. position and in a state of equilibrium, will bring thevalve to its seat without the usual attendant chattering. My experimentsalong this line have proven that it is due to the use of thepressure-reducing valve 8, that the chattering of the main valve iseliminated. The importance of this feature will be appreciated byengineers and those familiar with the use and operation of valves forthe control of steam or other fluids under ressure. The fixed reductionof pressure in the chamber 9 might be efi'ected by means of a reducingvalve of the ordinarv type, but my weighted valve has points ofsuperiority thereover in that the channel 10 can be made larger and,therefore, less liable to become obstructed, and that the channel iscompletely closed until the minimum amount of inlet pressure necessaryto counter-balance the weight of the valve parts has been exceeded.

The several important advantages of my invention will now be apparentThe electromagnetic actuating mechanism is completely isolated fromthose parts which are subjected to the action of the steam and yetwithout tion, the valve disk will take a position that the use of anystufling boxes to restrain and impede the movement of the reciprocatingparts. \Vhen the valve is in the open posiproduces a fixed proportionaldifference of pressure between the inlet and outlet sides of the valvecasing and will maintain that position in a state of equilibrium withoutvibration. The drop in pressure between the two sides of the main valvedisk is automatically adjusted by the proportionate .28 being raisedinto the closed position when the armature disk 36 is attracted. Theoperation will be understood from the de scription and explanation ofFig. 1.

It Will be apparent to engineers in this art, that many changes may bemade in the structure of the device or in the arrangement of the partswhile retaining the salient features of my invention.

I claim 1. Valve mechanism comprising a main valve member having achannel therethrough, a weighted pressure-reducing valve controllingsaid channel, and operating in all elevated positions to etl'eet asubstantial fixed reduction of pressure at points beyond said weightedvalve, a passage connecting said channel with the valve outlet, andcontrolling means for opening or closing said passage.

2. Valve mechanism comprising a casing having an inlet and an outlet anda diaphragm provided with a valve opening, a main valve for saidopening, having a channel therethrough, a weighted pressurereducingvalve controlling said channel, and operating in all elevated positionsto effect a substantial fixed reduction of pressure at points beyondsaid weighted valve, and maintaining the same closed against a pressuresubstantially equal to the weight of the main valve, a passageconnecting said channel with the outlet, and a pilot valve controllingsaid passage.

-3. Valve mechanism comprising a casing having an inlet and outlet and adiaphragm provided with a valve opening, a main valve for said opening,a pilot valve controlling the operation of said main valve and apressure-reducing valve cooperating with said main valve to eliminatethe weight of said main valve as a determining factor in the movementthereof, thereby enabling it to seat without vibration.

4. Valve mechanism comprising a casing having an inlet and outlet and adiaphragm provided with a valve opening, a main 'tIlVt' for saidopening, a pilot valve controlling the operation of said main'valve anda single member cooperating with said main valve to eliminate the weightof said main valve as a determining factor in the movement thereof,thereby enabling it to seat without vibration.

Valve mechanism comprising a casing having an inlet and an outlet and adiaphragm provided with a valve seat. a main valve for said seat havinga channel therethrough provided with an enlarged central cavity and arestricted discharge orifice, a weighted pressure-redncing valve withinsaid central cavity, and operating in all elevated positions to effect asubstantial fixed reduction of pressure at points beyond said weightedvalve, a channel connecting said oritice with said outlet and includinga valve seat having an area proportioned to the area of said orifice,and a pilot'valve controlling said valve seat.

(3. Valve mechanism comprising a casing having an inlet and an outletand a diaphragm provided with a valve seat, a main valve for said seat,a hollow shell detachably connected with said casing, a piston dependingwithin said shell, a cylinder slidably mounted upon said piston andsepa- "rably supported upon said main valve, a channel in said valvehaving an enlarged chamber and connecting the inlet with the cylinderchamber, a weighted pressure-reducing valve in said chamber operating inall elevated positions to cited a substantial fixed reduction ofpressure at points beyond said weighted valve, a passage in said pistonconnecting said chamber with the outlet, and a pilot valve controllingsaid passage and thereby the operation of the main valve.

7. Valve mechanism comprising a casing having an inlet and an outlet anda diaphragm provided with a valve seat, a main ive for said seat. ahollow shell detachably connected with said casing, a piston dependingwithin said shell, a cylinder slidably mounted upon said piston andseparably supported upon said main valve, a channel in said valve havingan enlarged chamber and connecting the inlet with the cylinder chamber,a weighted pressure-re ducing valve in said chamber operating in allelevated positions to etl'ect a substantial fixed reduction of pressureat points beyond said weighted valve, a passage in said pistonconnecting said chamber with the outlet, a pilot valve controlling saidpassage and thereby the operation of the main valve, and means formaintaining the main valve in stable equilibrium when in the lifted oropen position.

8. Valve mechanism comprising a casing having an inlet and an outlet anda diaphragm provided with a valve seat, a main valve for said seat, a.hollow shell detachably connected with said casing, a piston dependingwithin said shell, a. cylinder slidably mounted upon said piston andseparably supported upon said main valve,- a plurality of removablepacking members effecting a tight joint between the cylinder and themain valve, a channel in sald valve connectingthe inlet with thecylinder chamber, a-

weighted pressure reducing valve in said 10 channel, a passage in saidpiston connecting said chamber with the outlet, and a pilot valvecontrolling said passa e and thereby the operation of the main va ve.

In testimony whereof I have hereunto set 4 my hand in presence of twosubscribing wit- 1 nesses. v i

HARRY G. GEISSINGERM Witnesses: I

LAURA E. SMITH, J. H. GOLDSTEIN

